let $ = require("jquery");
module.exports = {
    /***
     * 将任意数量对象或者字符串传入该方法，若有任意一个为空，则返回true
     * 可判断 空对象 空数组 空字符串 undefined null
     * @returns {boolean}
     */
    isEmpty: function (){
        let len = arguments.length;
        if(len === 0){ return true; }
        for(let i=0;i<len;i++){
            let a = arguments[i];
            if(typeof a === "undefined" || a === null || (typeof a === "string" && a.trim() === "")){
                return true;
            }else if(typeof a === "object"){
                let flg = true;
                for (let name in a ) {
                    flg = false;
                    break;
                }
                if(flg){ return true; }
            }
        }
        return false;
    },
    uuid:function (len, radix) {
        let CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
        let chars = CHARS, uuid = [], i;
        radix = radix || chars.length;
        if (len) {
            for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];
        } else {
            let r;
            uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
            uuid[14] = '4';
            for (i = 0; i < 36; i++) {
                if (!uuid[i]) {
                    r = 0 | Math.random()*16;
                    uuid[i] = chars[(i === 19) ? (r & 0x3) | 0x8 : r];
                }
            }
        }
        return uuid.join('');
    },
    timeFormat:function (date, fmt) {
        let o = {
            "M+": date.getMonth() + 1, //月份
            "d+": date.getDate(), //日
            "h+": date.getHours(), //小时
            "m+": date.getMinutes(), //分
            "s+": date.getSeconds(), //秒
            "q+": Math.floor((date.getMonth() + 3) / 3), //季度
            "S": date.getMilliseconds() //毫秒
        };
        if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));
        for (let k in o)
            if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
        return fmt;
    },
    ajax:function (para) {
        let finalOption = Object.assign({
            type:"get",
            // dataType:"json",
            // contentType:"application/json",
            // contentType:"application/x-www-form-urlencoded",
            // contentType:"multipart/form-data",
        },para);
        return $.ajax(finalOption)
    },
    isMobile:function () {
        let u = navigator.userAgent;
        if(!!u.match(/AppleWebKit.*Mobile.*/)){//mobile
            return true
        }
        if(!!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/)){//ios
            return true
        }
        if(u.indexOf('Android') > -1 || u.indexOf('Linux') > -1){//android
            return true
        }
        if(u.indexOf('iPhone') > -1){//iPhone
            return true
        }
        return false
    },
    Base64:function () {
	let _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

	this.encode = function (input) {
	    let output = "";
	    let chr1, chr2, chr3, enc1, enc2, enc3, enc4;
	    let i = 0;
	    input = _utf8_encode(input);
	    while (i < input.length) {
		chr1 = input.charCodeAt(i++);
		chr2 = input.charCodeAt(i++);
		chr3 = input.charCodeAt(i++);
		enc1 = chr1 >> 2;
		enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
		enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
		enc4 = chr3 & 63;
		if (isNaN(chr2)) {
		    enc3 = enc4 = 64;
		} else if (isNaN(chr3)) {
		    enc4 = 64;
		}
		output = output +
		    _keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
		    _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
	    }
	    return output;
	};

	// public method for decoding
	this.decode = function (input) {
	    let output = "";
	    let chr1, chr2, chr3;
	    let enc1, enc2, enc3, enc4;
	    let i = 0;
	    input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
	    while (i < input.length) {
		enc1 = _keyStr.indexOf(input.charAt(i++));
		enc2 = _keyStr.indexOf(input.charAt(i++));
		enc3 = _keyStr.indexOf(input.charAt(i++));
		enc4 = _keyStr.indexOf(input.charAt(i++));
		chr1 = (enc1 << 2) | (enc2 >> 4);
		chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
		chr3 = ((enc3 & 3) << 6) | enc4;
		output = output + String.fromCharCode(chr1);
		if (enc3 != 64) {
		    output = output + String.fromCharCode(chr2);
		}
		if (enc4 != 64) {
		    output = output + String.fromCharCode(chr3);
		}
	    }
	    output = _utf8_decode(output);
	    return output;
	};

	// private method for UTF-8 encoding
	let _utf8_encode = function (string) {
	    string = string.replace(/\r\n/g,"\n");
	    let utftext = "";
	    for (let n = 0; n < string.length; n++) {
		let c = string.charCodeAt(n);
		if (c < 128) {
		    utftext += String.fromCharCode(c);
		} else if((c > 127) && (c < 2048)) {
		    utftext += String.fromCharCode((c >> 6) | 192);
		    utftext += String.fromCharCode((c & 63) | 128);
		} else {
		    utftext += String.fromCharCode((c >> 12) | 224);
		    utftext += String.fromCharCode(((c >> 6) & 63) | 128);
		    utftext += String.fromCharCode((c & 63) | 128);
		}

	    }
	    return utftext;
	};

	let _utf8_decode = function (utftext) {
	    let string = "";
	    let i = 0;
	    let [c,c1,c2,c3] = [0,0,0,0];
	    while ( i < utftext.length ) {
		c = utftext.charCodeAt(i);
		if (c < 128) {
		    string += String.fromCharCode(c);
		    i++;
		} else if((c > 191) && (c < 224)) {
		    c2 = utftext.charCodeAt(i+1);
		    string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
		    i += 2;
		} else {
		    c2 = utftext.charCodeAt(i+1);
		    c3 = utftext.charCodeAt(i+2);
		    string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
		    i += 3;
		}
	    }
	    return string;
	}
    }
};